use async_trait::async_trait;
use chrono::{DateTime, Utc};
use crate::application::dtos::calendar_dto::{
    CalendarDto, CalendarEventDto, CreateCalendarDto, UpdateCalendarDto,
    CreateEventDto, UpdateEventDto, CreateEventICalDto
};
use crate::common::errors::DomainError;

/// Port for external calendar storage mechanisms
#[async_trait]
pub trait CalendarStoragePort: Send + Sync + 'static {
    // Calendar operations
    async fn create_calendar(&self, calendar: CreateCalendarDto, owner_id: &str) -> Result<CalendarDto, DomainError>;
    async fn update_calendar(&self, calendar_id: &str, update: UpdateCalendarDto) -> Result<CalendarDto, DomainError>;
    async fn delete_calendar(&self, calendar_id: &str) -> Result<(), DomainError>;
    async fn get_calendar(&self, calendar_id: &str) -> Result<CalendarDto, DomainError>;
    async fn list_calendars_by_owner(&self, owner_id: &str) -> Result<Vec<CalendarDto>, DomainError>;
    async fn list_calendars_shared_with_user(&self, user_id: &str) -> Result<Vec<CalendarDto>, DomainError>;
    async fn list_public_calendars(&self, limit: i64, offset: i64) -> Result<Vec<CalendarDto>, DomainError>;
    async fn check_calendar_access(&self, calendar_id: &str, user_id: &str) -> Result<bool, DomainError>;
    
    // Calendar sharing
    async fn share_calendar(&self, calendar_id: &str, user_id: &str, access_level: &str) -> Result<(), DomainError>;
    async fn remove_calendar_sharing(&self, calendar_id: &str, user_id: &str) -> Result<(), DomainError>;
    async fn get_calendar_shares(&self, calendar_id: &str) -> Result<Vec<(String, String)>, DomainError>;
    
    // Calendar properties
    async fn set_calendar_property(&self, calendar_id: &str, property_name: &str, property_value: &str) -> Result<(), DomainError>;
    async fn get_calendar_property(&self, calendar_id: &str, property_name: &str) -> Result<Option<String>, DomainError>;
    async fn get_calendar_properties(&self, calendar_id: &str) -> Result<std::collections::HashMap<String, String>, DomainError>;
    
    // Event operations
    async fn create_event(&self, event: CreateEventDto) -> Result<CalendarEventDto, DomainError>;
    async fn create_event_from_ical(&self, event: CreateEventICalDto) -> Result<CalendarEventDto, DomainError>;
    async fn update_event(&self, event_id: &str, update: UpdateEventDto) -> Result<CalendarEventDto, DomainError>;
    async fn delete_event(&self, event_id: &str) -> Result<(), DomainError>;
    async fn get_event(&self, event_id: &str) -> Result<CalendarEventDto, DomainError>;
    async fn list_events_by_calendar(&self, calendar_id: &str) -> Result<Vec<CalendarEventDto>, DomainError>;
    async fn list_events_by_calendar_paginated(&self, calendar_id: &str, limit: i64, offset: i64) -> Result<Vec<CalendarEventDto>, DomainError>;
    async fn get_events_in_time_range(
        &self, 
        calendar_id: &str, 
        start: &DateTime<Utc>, 
        end: &DateTime<Utc>
    ) -> Result<Vec<CalendarEventDto>, DomainError>;
}

/// Port for calendar use cases
#[async_trait]
pub trait CalendarUseCase: Send + Sync + 'static {
    // Calendar operations
    async fn create_calendar(&self, calendar: CreateCalendarDto) -> Result<CalendarDto, DomainError>;
    async fn update_calendar(&self, calendar_id: &str, update: UpdateCalendarDto) -> Result<CalendarDto, DomainError>;
    async fn delete_calendar(&self, calendar_id: &str) -> Result<(), DomainError>;
    async fn get_calendar(&self, calendar_id: &str) -> Result<CalendarDto, DomainError>;
    async fn list_my_calendars(&self) -> Result<Vec<CalendarDto>, DomainError>;
    async fn list_shared_calendars(&self) -> Result<Vec<CalendarDto>, DomainError>;
    async fn list_public_calendars(&self, limit: Option<i64>, offset: Option<i64>) -> Result<Vec<CalendarDto>, DomainError>;
    
    // Calendar sharing
    async fn share_calendar(&self, calendar_id: &str, user_id: &str, access_level: &str) -> Result<(), DomainError>;
    async fn remove_calendar_sharing(&self, calendar_id: &str, user_id: &str) -> Result<(), DomainError>;
    async fn get_calendar_shares(&self, calendar_id: &str) -> Result<Vec<(String, String)>, DomainError>;
    
    // Event operations
    async fn create_event(&self, event: CreateEventDto) -> Result<CalendarEventDto, DomainError>;
    async fn create_event_from_ical(&self, event: CreateEventICalDto) -> Result<CalendarEventDto, DomainError>;
    async fn update_event(&self, event_id: &str, update: UpdateEventDto) -> Result<CalendarEventDto, DomainError>;
    async fn delete_event(&self, event_id: &str) -> Result<(), DomainError>;
    async fn get_event(&self, event_id: &str) -> Result<CalendarEventDto, DomainError>;
    async fn list_events(&self, calendar_id: &str, limit: Option<i64>, offset: Option<i64>) -> Result<Vec<CalendarEventDto>, DomainError>;
    async fn get_events_in_range(
        &self, 
        calendar_id: &str, 
        start: DateTime<Utc>, 
        end: DateTime<Utc>
    ) -> Result<Vec<CalendarEventDto>, DomainError>;
}